<script setup lang="ts">
import type { InputNumberBoxEvent } from '@/types/vk-data-input-number-box'
import { useMemberStore } from '@/stores'
import {
  getMemberCartAPI,
  deleteMemberCartAPI,
  putMemberCartAPI,
  putMemberCartSelectedAPI,
} from '@/services/cart'
import type { CartItem } from '@/types/cart'
import { ref, computed } from 'vue'
import { onLoad } from '@dcloudio/uni-app'
const memberStore = useMemberStore()

const cartList = ref<CartItem[]>([])
// 获取购物车列表数据
const getMemberCartData = async () => {
  cartList.value = await getMemberCartAPI()
}

onLoad(() => {
  getMemberCartData()
})

// 删除购物车
const onDeleteCart = (id: string) => {
  // 确认弹框
  uni.showModal({
    content: '确实删除此商品么',
    success: async (params) => {
      // 点击了取消,提前结束
      if (!params.confirm) return
      // 发起删除请求
      await deleteMemberCartAPI([id])
      // 重新获取购物车列表
      getMemberCartData()
    },
  })
}

// 单品数量变化时
const onCountChange = async (e: InputNumberBoxEvent) => {
  // e.index: SKUID
  // e.value: 数量
  // 发请求
  await putMemberCartAPI(e.index, {
    count: e.value,
  })
}

// 单品选中状态变化时
const onSelectedChange = async (item: CartItem) => {
  await putMemberCartAPI(item.skuId, {
    // 选中状态取反发到后台
    selected: !item.selected,
  })
  // 更新选中状态

  // 方式1：重新获取购物车列表
  // getMemberCartData()

  // 方式2：数据层面取反
  item.selected = !item.selected
}

// 是否都选中了
const isAllSelected = computed<boolean>(() => {
  return cartList.value.length ? cartList.value.every((item) => item.selected) : false
})

// 全选状态变化时
const onAllSelectedChange = async () => {
  // 发起请求
  await putMemberCartSelectedAPI(!isAllSelected.value)
  // 更新所有单品的状态

  // 重新获取购物车列表
  getMemberCartData()
}

// 计算得到选中的商品列表
const selectedCartList = computed<CartItem[]>(() => {
  return cartList.value.filter((item) => item.selected)
})

// 总件数
const totalCount = computed<number>(() => {
  return selectedCartList.value.reduce((prev, { count }) => prev + count, 0)
})
// 总钱数
const totalPrice = computed<number>(() => {
  return selectedCartList.value.reduce((prev, { price, count }) => prev + price * count, 0)
})

// 跳转预付订单页
const gotoOrderCreate = () => {
  // 没有选择商品，提示并结束
  if (!totalCount.value)
    return uni.showToast({
      title: '请选择商品',
      icon: 'none',
    })
  // 跳转预付订单页
  uni.navigateTo({
    url: '/pagesOrder/create/create',
  })
}
</script>

<template>
  <scroll-view
    scroll-y
    class="scroll-view"
  >
    <!-- 已登录: 显示购物车 -->
    <template v-if="memberStore.profile">
      <!-- 购物车列表 -->
      <view
        class="cart-list"
        v-if="cartList.length"
      >
        <!-- 优惠提示 -->
        <view class="tips">
          <text class="label">满减</text>
          <text class="desc">满1件, 即可享受9折优惠</text>
        </view>
        <!-- 滑动操作分区 -->
        <uni-swipe-action>
          <!-- 滑动操作项 -->
          <uni-swipe-action-item
            v-for="item in cartList"
            :key="item.skuId"
            class="cart-swipe"
          >
            <!-- 商品信息 -->
            <view class="goods">
              <!-- 选中状态 -->
              <text
                class="checkbox"
                :class="{ checked: item.selected }"
                @tap="onSelectedChange(item)"
              ></text>
              <navigator
                :url="`/pages/goods/goods?id=${item.id}`"
                hover-class="none"
                class="navigator"
              >
                <image
                  mode="aspectFill"
                  class="picture"
                  :src="item.picture"
                ></image>
                <view class="meta">
                  <view class="name ellipsis">{{ item.name }}</view>
                  <view class="attrsText ellipsis">{{ item.attrsText }}</view>
                  <view class="price">{{ item.price }}</view>
                </view>
              </navigator>
              <!-- 商品数量 -->
              <view class="count">
                <!-- 商品数量输入框组件 -->
                <vk-data-input-number-box
                  v-model="item.count"
                  :min="1"
                  :max="item.stock"
                  :index="item.skuId"
                  @change="onCountChange"
                />
              </view>
            </view>
            <!-- 右侧删除按钮 -->
            <template #right>
              <view class="cart-swipe-right">
                <button
                  class="button delete-button"
                  @tap="onDeleteCart(item.skuId)"
                >
                  删除
                </button>
              </view>
            </template>
          </uni-swipe-action-item>
        </uni-swipe-action>
      </view>
      <!-- 购物车空状态 -->
      <view
        class="cart-blank"
        v-else
      >
        <image
          src="/static/images/blank_cart.png"
          class="image"
        />
        <text class="text">购物车还是空的，快来挑选好货吧</text>
        <navigator
          url="/pages/index/index"
          hover-class="none"
        >
          <button class="button">去首页看看</button>
        </navigator>
      </view>
      <!-- 吸底工具栏 -->
      <view class="toolbar">
        <text
          class="all"
          :class="{ checked: isAllSelected }"
          @tap="onAllSelectedChange"
          >全选</text
        >
        <text class="text">合计:</text>
        <text class="amount">{{ totalPrice.toFixed(2) }}</text>
        <view class="button-grounp">
          <view
            class="button payment-button"
            @tap="gotoOrderCreate"
            :class="{ disabled: !totalCount }"
          >
            去结算({{ totalCount }})
          </view>
        </view>
      </view>
    </template>
    <!-- 未登录: 提示登录 -->
    <view
      class="login-blank"
      v-else
    >
      <text class="text">登录后可查看购物车中的商品</text>
      <navigator
        url="/pages/login/login"
        hover-class="none"
      >
        <button class="button">去登录</button>
      </navigator>
    </view>
    <!-- 猜你喜欢 -->
    <XtxGuess ref="guessRef"></XtxGuess>
    <!-- 底部占位空盒子 -->
    <view class="toolbar-height"></view>
  </scroll-view>
</template>

<style lang="scss">
// 根元素
:host {
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background-color: #f7f7f8;
}

// 滚动容器
.scroll-view {
  flex: 1;
}

// 购物车列表
.cart-list {
  padding: 0 20rpx;

  // 优惠提示
  .tips {
    display: flex;
    align-items: center;
    line-height: 1;
    margin: 30rpx 10rpx;
    font-size: 26rpx;
    color: #666;

    .label {
      color: #fff;
      padding: 7rpx 15rpx 5rpx;
      border-radius: 4rpx;
      font-size: 24rpx;
      background-color: #27ba9b;
      margin-right: 10rpx;
    }
  }

  // 购物车商品
  .goods {
    display: flex;
    padding: 20rpx 20rpx 20rpx 80rpx;
    border-radius: 10rpx;
    background-color: #fff;
    position: relative;

    .navigator {
      display: flex;
    }

    .checkbox {
      position: absolute;
      top: 0;
      left: 0;

      display: flex;
      align-items: center;
      justify-content: center;
      width: 80rpx;
      height: 100%;

      &::before {
        content: '\e6cd';
        font-family: 'erabbit' !important;
        font-size: 40rpx;
        color: #444;
      }

      &.checked::before {
        content: '\e6cc';
        color: #27ba9b;
      }
    }

    .picture {
      width: 170rpx;
      height: 170rpx;
    }

    .meta {
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-evenly;
      margin-left: 20rpx;
    }

    .name {
      height: 72rpx;
      font-size: 26rpx;
      color: #444;
    }

    .attrsText {
      line-height: 1.8;
      padding: 0 15rpx;
      font-size: 24rpx;
      align-self: flex-start;
      border-radius: 4rpx;
      color: #888;
      background-color: #f7f7f8;
    }

    .price {
      line-height: 1;
      font-size: 26rpx;
      color: #444;
      margin-bottom: 2rpx;
      color: #cf4444;

      &::before {
        content: '￥';
        font-size: 80%;
      }
    }

    // 商品数量
    .count {
      position: absolute;
      bottom: 6rpx;
      right: 5rpx;

      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 220rpx;
      height: 48rpx;

      .text {
        height: 100%;
        padding: 0 20rpx;
        font-size: 32rpx;
        color: #444;
      }

      .input {
        height: 100%;
        text-align: center;
        border-radius: 4rpx;
        font-size: 24rpx;
        color: #444;
        background-color: #f6f6f6;
      }
    }
  }

  .cart-swipe {
    display: block;
    margin: 20rpx 0;
  }

  .cart-swipe-right {
    display: flex;
    height: 100%;

    .button {
      display: flex;
      justify-content: center;
      align-items: center;
      width: 50px;
      padding: 6px;
      line-height: 1.5;
      color: #fff;
      font-size: 26rpx;
      border-radius: 0;
    }

    .delete-button {
      background-color: #cf4444;
    }
  }
}

// 空状态
.cart-blank,
.login-blank {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  height: 60vh;
  .image {
    width: 400rpx;
    height: 281rpx;
  }
  .text {
    color: #444;
    font-size: 26rpx;
    margin: 20rpx 0;
  }
  .button {
    width: 240rpx !important;
    height: 60rpx;
    line-height: 60rpx;
    margin-top: 20rpx;
    font-size: 26rpx;
    border-radius: 60rpx;
    color: #fff;
    background-color: #27ba9b;
  }
}

// 吸底工具栏
.toolbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: calc(var(--window-bottom));
  z-index: 1;

  height: 100rpx;
  padding: 0 20rpx;
  display: flex;
  align-items: center;
  border-top: 1rpx solid #ededed;
  border-bottom: 1rpx solid #ededed;
  background-color: #fff;

  .all {
    margin-left: 25rpx;
    font-size: 14px;
    color: #444;
    display: flex;
    align-items: center;
  }

  .all::before {
    font-family: 'erabbit' !important;
    content: '\e6cd';
    font-size: 40rpx;
    margin-right: 8rpx;
  }

  .checked::before {
    content: '\e6cc';
    color: #27ba9b;
  }

  .text {
    margin-right: 8rpx;
    margin-left: 32rpx;
    color: #444;
    font-size: 14px;
  }

  .amount {
    font-size: 20px;
    color: #cf4444;

    .decimal {
      font-size: 12px;
    }

    &::before {
      content: '￥';
      font-size: 12px;
    }
  }

  .button-grounp {
    position: absolute;
    right: 10rpx;
    top: 50%;

    display: flex;
    justify-content: space-between;
    text-align: center;
    line-height: 72rpx;
    font-size: 13px;
    color: #fff;
    transform: translateY(-50%);

    .button {
      width: 240rpx;
      margin: 0 10rpx;
      border-radius: 72rpx;
    }

    .payment-button {
      background-color: #27ba9b;

      &.disabled {
        opacity: 0.6;
      }
    }
  }
}
// 底部占位空盒子
.toolbar-height {
  height: 100rpx;
  box-sizing: content-box;
}
</style>
